65228870691 has 12 divisors (see below), whose sum is σ = 94221976368. Its totient is φ = 43484761584.

The previous prime is 65228870633. The next prime is 65228870699. The reversal of 65228870691 is 19607882256.

It is not a de Polignac number, because 65228870691 - 2⁷ = 65228870563 is a prime.

It is not an unprimeable number, because it can be changed into a prime (65228870699) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 394306 + ... + 534728.

It is an arithmetic number, because the mean of its divisors is an integer number (7851831364).

Almost surely, 2^65228870691 is an apocalyptic number.

65228870691 is a deficient number, since it is larger than the sum of its proper divisors (28993105677).

65228870691 is a wasteful number, since it uses less digits than its factorization.

65228870691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192042 (or 192039 counting only the distinct ones).

The product of its (nonzero) digits is 2903040, while the sum is 54.

The spelling of 65228870691 in words is "sixty-five billion, two hundred twenty-eight million, eight hundred seventy thousand, six hundred ninety-one".